just like, well, no just likes, you're nervous, but when you learn to direct that nervous energy in a positive direction, only through preparation, if you're prepared, you'll be ready. it will be fun. >> i embrace nerves sometimes. i remind myself it means i care, i care so much about something. finally, how about the big guarantee you made at super bowl iii. want to make any guarantees for me tonight in. >> yes, i do. i guarantee the crimson tide respects the bunch they'll be facing tonight. notre dame, they're in this game because they went 12-0 undefeated and know how to win. >> give me a roll tide, joe namath. >> roll, tide, roll! >> good luck. as an objective journalist, good luck to the fighting irish as well. if you want to catch up with joe, he's on twitter. @realjoea @realjoenamath. >>> all you need to unlock your brain power is your iphone your ipad or a laptop. and some insects in a kit called the spiker box. chief medical correspondent dr. sanjay gupta has this preview of "the next list." >> this is brand-new stuff. this allows us to do neuroscience with the actual human b